Enable to create several hsi filters

I'd like to create several hsi filters at the same time, such as red filter and blue filter.

I created PR to achieve this.
In this PR, different filter share the same nodelet_manager.
To run this,
```
# first filter launch
$ roslaunch jsk_pcl_ros hsi_color_filter.launch h_min:=-120 h_max:=-50 FILTER_NAME_SUFFIX:=blue

# second filter launch
$ roslaunch jsk_pcl_ros hsi_color_filter.launch h_min:=-30 h_max:=30 FILTER_NAME_SUFFIX:=red create_manager:=false
```
@garaemon, could you please review this?